Whether these objects are one of two types is dependent on a ratio known as
Whether these objects are one of two types is dependent on a ratio known as the Ginzburg-Landau parameter. One theory explaining these objects claims that they create condensed boson-like electron pairs known as Cooper pairs. Described in BCS theory, they exhibit the Meissner effect, as they lack an interior magnetic field. For 10 points, identify these objects, which when cooled down to extremely low temperatures, have zero electrical resistance.
Whether these objects are one of two types is dependent on a ratio known as the Ginzburg-Landau parameter.
{superconductors} [accept word forms]